${\text{100 c}}{{\text{m}}^{\text{3}}}$ of a ${\text{1.00 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}$ solution of hydrochloric acid is added to 2.00 g of small pieces of calcium carbonate at 20 °C. The volume of carbon dioxide produced against time is plotted to give curve P.

Which change will produce curve Q, given that calcium carbonate is always the limiting reagent?

A.     Increasing the volume of the hydrochloric acid to ${\text{200 c}}{{\text{m}}^{\text{3}}}$

B.     Increasing the mass of calcium carbonate to 4.00 g

C.     Increasing the concentration of the hydrochloric acid to ${\text{2.00 mol}}\,{\text{d}}{{\text{m}}^{ - 3}}$

D.     Replacing the 2.00 g of small pieces of calcium carbonate with 2.00 g of larger pieces of calcium carbonate

C